Fix statistical complexity

[kahaaga]

Fixes #368

• Removes reference to input data x in the constructor - it isn't actually used for anything.
• Generalizes the statistical complexity to any probabilities estimator too, not only any outcome space and information measure.
• Changes the name of a few keyword arguments to match the terminology in the rest of the package (deprecations are in place and tested).

For now, the PlugIn estimator is used to estimate the information measure. It would be possible to extend the method to using different DiscreteInfoEstimators too, but that would require quite a bit of custom code that is way beyond the scope of this PR, which just aims to fix #368 .

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (554b779) 89.25% compared to head (e224d53) 89.29%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #373 +/- ## ========================================== + Coverage 89.25% 89.29% +0.04% ========================================== Files 79 79 Lines 2261 2271 +10 ========================================== + Hits 2018 2028 +10 Misses 243 243 ```

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